Sha256: 407d51007d0e1ed28b5de959ed7549a8298dfdc66f36685cd62c87a3bc93634b
Contents?: true
Size: 1.71 KB
Versions: 19
Compression:
Stored size: 1.71 KB
Contents
var isNumber = require('../../tokenizer').isNumber;
var TYPE = require('../../tokenizer').TYPE;
var NUMBER = TYPE.Number;
var SOLIDUS = TYPE.Solidus;
var FULLSTOP = TYPE.FullStop;
// Terms of <ratio> should to be a positive number (not zero or negative)
// (see https://drafts.csswg.org/mediaqueries-3/#values)
// However, -o-min-device-pixel-ratio takes fractional values as a ratio's term
// and this is using by various sites. Therefore we relax checking on parse
// to test a term is unsigned number without exponent part.
// Additional checks may to be applied on lexer validation.
function consumeNumber(scanner) {
var value = scanner.consumeNonWS(NUMBER);
for (var i = 0; i < value.length; i++) {
var code = value.charCodeAt(i);
if (!isNumber(code) && code !== FULLSTOP) {
scanner.error('Unsigned number is expected', scanner.tokenStart - value.length + i);
}
}
if (Number(value) === 0) {
scanner.error('Zero number is not allowed', scanner.tokenStart - value.length);
}
return value;
}
// <positive-integer> S* '/' S* <positive-integer>
module.exports = {
name: 'Ratio',
structure: {
left: String,
right: String
},
parse: function() {
var start = this.scanner.tokenStart;
var left = consumeNumber(this.scanner);
var right;
this.scanner.eatNonWS(SOLIDUS);
right = consumeNumber(this.scanner);
return {
type: 'Ratio',
loc: this.getLocation(start, this.scanner.tokenStart),
left: left,
right: right
};
},
generate: function(node) {
this.chunk(node.left);
this.chunk('/');
this.chunk(node.right);
}
};
Version data entries
19 entries across 18 versions & 4 rubygems